Zenith 2BU2 2AS2 2AS2A 2AH2 Vacuum Tube Valve NOS NIB Winsbadener Eterna Transconductance measured 44 and 48

Transconductance measured 44 and 48 where minimum (65%) is 35 and 100% is 54

(New US 6L6GCs typically test with plate current from the low 20s to mid 30s with transconductance from 2200 micromhos or so

new in box RCA Radiotron 12SH7 tubes tested to spec on our Paul Hart-calibrated TV7/U

It measured 40 where minimum (65%) is 31

They are dead quiet when just the amplifier is running and have excellent frequency response

Zenith 2BU2 2AS2 2AS2A 2AH2 Vacuum Tube Valve NOS NIB Winsbadener Eterna Transconductance measured 44 and 48This new old stock, new in box Zenith 2BU2 2AS2 2AS2A 2AH2 tested to spec on our Paul Hart calibrated TV7 U. BECAUSE OF THE BIZARRE, INTRUSIVE AND DRACONIAN GERMAN PACKAGING REGULATIONS AND THE SEVERE FINES AND PRIVACY INTRUSIONS ASSOCIATED WITH THEM WE NO LONGER SHIP TO GERMAN ADDRESSES. WE WILL HAPPILY SEND YOUR PACKAGE TO A NEIGHBORING COUNTRY OR MAKE SUITABLE ARRANGEMENTS. IN 2021 WE PURCHASED 150,000 VACUUM TUBES. IF IT'S NOT LISTED, WE PROBABLY